There are two pressure balances of circulating loop in the DDCFB.

系统中存在着两路的压力平衡。

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Steam within the primary loop, now no longer circulating with the water, rises.

主回路中的蒸汽，不再同水一起循环，而是升腾起来。

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However, there is also an eddy of cooler water (purple) circulating counterclockwise at the top of the Loop Current.

不过，在洋流的顶端还出现一个逆时针方向旋转的水流(紫色部分)，而且温度较低。

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The gravity-based system responded as it was designed to, circulating water and steam in a continuous loop to keep the scale-model reactor at a safe temperature automatically.

CNN: Today/Tomorrow - Helping nuclear plants keep their cool